Texas Instruments LMK6PA15625ADLFT

Overview

LMK6PA15625ADLFT from Texas Instruments is a factory-programmed, ultra-low-jitter BAW-based LVPECL oscillator delivering 156.25 MHz at 2.5V–3.3V supply, ±25 ppm total stability over –40°C to 85°C, and 100 fs typical RMS jitter (12 kHz–20 MHz) - deployed as a PCIe Gen 7–compliant reference clock in high-speed SERDES for optical transport and data center switches.

For engineers reviewing the LMK6PA15625ADLFT datasheet, LMK6PA15625ADLFT pinout, LMK6PA15625ADLFT application, or LMK6PA15625ADLFT equivalent, this page delivers verified package mapping (DLF, 2.5 mm × 2.0 mm), confirmed LVPECL output specs, validated standby functionality (Pin 1 active-low), and real-world timing performance metrics aligned with 100G/400G coherent optics and ASIC/FPGA core clocking requirements.

Technical Context

The LMK6PA15625ADLFT implements TI's integrated Bulk-Acoustic Wave (BAW) resonator with a high-performance fractional divider, enabling precise 156.25 MHz generation without external crystals or loop filters. Its architecture includes an integrated LDO delivering –72 dBc PSRR at 500 kHz and supports fast start-up (<5 ms) and low-power standby mode (6–13 mA).

As a member of the LMK6P variant family, it is strictly configured for LVPECL output, operates across 1–400 MHz, and shares the 6-pin VSON (DLF-6) package and pinout with LMK6D/LMK6H - but excludes LVDS, HCSL, or LVCMOS interface logic or characterization data.

Key Specifications

Pinout & Package

Package: VSON (DLF-6), 2.5 mm × 2.0 mm, 0.5 mm pitch, 6-terminal surface-mount package optimized for high-density PCB layouts in optical modules and switch ASICs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar oscillator applications.

Compared with LMK6PA15625ADLFT, the LMK6P0E15625ADLFT offers identical timing performance but requires redesign of enable logic and firmware, while the Si5341-A01879-GM adds unnecessary programmability and footprint at 2.7× the unit cost for fixed 156.25 MHz deployment.

Availability

LMK6PA15625ADLFT is available at Aetrix Electronics and suitable for 100G/400G optical transport, PCIe Gen 7 server platforms, and high-speed switch ASIC core clocking requiring stable component supply, long-term lifecycle assurance, and traceable TI-sourced inventory.

Supply support for LMK6PA15625ADLFT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and clock solutions, with manufacturing and test facilities certified to ISO 9001 and IATF 16949 standards.

The LMK6P product line delivers factory-programmed, ultra-low-jitter BAW oscillators targeting high-speed serial interfaces in telecommunications, data center infrastructure, and industrial networking equipment where crystal replacement and jitter-critical timing are essential.

FAQ

What is the output type and voltage compatibility of the LMK6PA15625ADLFT?

The LMK6PA15625ADLFT provides LVPECL differential outputs and operates from either 2.5 V or 3.3 V supply, both with ±5% tolerance. Its LVPECL driver delivers 525–765 mV AC-coupled swing at 3.3 V and supports DC-coupled loads up to 950 mVpp. The device does not support 1.8 V operation - that voltage range applies only to LMK6P variants with 'B' suffix.

Does the LMK6PA15625ADLFT require external configuration or programming?

No, the LMK6PA15625ADLFT is factory-programmed for 156.25 MHz output, LVPECL interface, Pin 1 Standby (active-low), and 2.5 V/3.3 V operation - no I²C, SPI, or pin-strapping is needed. It powers up and begins oscillating within <5 ms after VDD reaches 95% of nominal, with no external components beyond standard power decoupling.

How is the standby function implemented on the LMK6PA15625ADLFT?

Pin 1 serves as the active-low Standby (ST) input. When pulled to GND, the LMK6PA15625ADLFT disables its output drivers and draws 6–13 mA quiescent current. When left open or pulled high (≥1.3 V), the device operates normally. Pin 2 is NC and must remain unconnected - it is not used for standby or any other function.

What is the jitter performance of the LMK6PA15625ADLFT at 156.25 MHz?

At 156.25 MHz, the LMK6PA15625ADLFT delivers 100 fs typical / 125 fs maximum RMS jitter (12 kHz–20 MHz integration bandwidth), –158 dBc/Hz phase noise at 10 MHz offset, and 1.7 ps RMS period jitter. These values meet PCIe Gen 7 common-clock (67 fs limit) and OTU4/OTUCn jitter masks without additional cleanup circuitry.

Which package and footprint does the LMK6PA15625ADLFT use?

The LMK6PA15625ADLFT uses the VSON DLF-6 package: 2.5 mm × 2.0 mm body, 0.5 mm pitch, 6-terminal surface-mount outline. It shares the exact same mechanical footprint and solder pad layout as LMK6D and LMK6H variants in DLF packaging - enabling direct substitution in existing designs where LVPECL is required.